Andries Dirk Copier was attached to the glass factory Leerdam from 1914 to 1970.
From 1923 designs for Unica and Serica vases and consumers glass, with for instance the models "Peer", "Smeerwortel", "Wijnbes", and the famous "Gilde" glass services.
From 1927 on artistic director of the glass factory Leerdam.
The Unica and Sericas vases are widely appriciated collectors items as for skillful applicated techniques of blown-out metal oxide layers that give the objects often a breathtaking beauty.
